From mboxrd@z Thu Jan 1 00:00:00 1970 From: public_timo.s@silentcreek.de (Timo Sigurdsson) Date: Tue, 28 Jul 2015 11:02:16 +0200 (CEST) Subject: [linux-sunxi] [RFC] ARM: dts: sunxi: Add regulators and board-specific operating points for LeMaker BananaPi In-Reply-To: References: <1437960486-2809-1-git-send-email-public_timo.s@silentcreek.de> <55B5E6DB.8020009@redhat.com> <20150727123653.36C046C8007E@dd34104.kasserver.com> <55B62A1B.6030601@redhat.com> Message-ID: <20150728090216.892076C80D94@dd34104.kasserver.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Hi, Chen-Yu Tsai schrieb am 27.07.2015 15:14: >> ChenYu (in the CC), since you did most of the original work here, do >> you know why we have an op at 0.9 volt, but none of our boards allow the >> voltage to go that low in the regulator settings ? > > I'm on vacation now, so apologies for the bad formatting. > > The OPPs are from a common subset > of the settings from the fex files available > at the time. Some fex files actually set > min and max voltage thus eliminating > the highest and lowest OPPs. > > At least that is how Maxime and I > interpreted them. IMHO for a common maximum opp that's a good approach. But for the lowest frequency setting, it would seem more logical to me, to raise the voltage to a point where all boards will run fine with them, unless those boards cannot handle the frequency regardless of the higher voltage. Regards, Timo